[D18] add LVDS WVGA single-channel(CHA) video support

* enabled at u-boot: seco_config tool
* connected on LVDS channel 0
* on CSB79REVB: panel Innolux NE070NB-04F + CV1408/750
  (LVDS CN14: switch SW6 2-4 position OFF, jumper CN18
  position 1-2 and CN19 position 2-3)

arch/arm64/boot/dts/seco/overlays/Makefile

@@ -40,6 +40,7 @@ dtbo-$(CONFIG_ARCH_MXC) += \
 	seco-imx8mp-d18-hdmi.dtbo\
 	seco-imx8mp-d18-edp.dtbo\
 	seco-imx8mp-d18-lvds-fhd.dtbo\
+	seco-imx8mp-d18-lvds-wvga-ne070nb04f.dtbo\
 	seco-imx8mp-d18-lvds-wvga-umsh8596md.dtbo\
 	seco-imx8mp-d18-ov5640-csi0-revA.dtbo\
 	seco-imx8mp-d18-ov5640-csi1-revA.dtbo\

arch/arm64/boot/dts/seco/overlays/seco-imx8mp-d18-lvds-wvga-ne070nb04f-overlay.dts

+/*
+ * Copyright 2021 SECO
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/display/media-bus-format.h>
+#include <dt-bindings/display/drm-mode-connector.h>
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "fsl,imx8mp-evk", "seco,imx8mp-d18", "fsl,imx8mp";
+
+/*  __________________________________________________________________________
+ * |                                                                          |
+ * |                               LVDS                                       |
+ * |__________________________________________________________________________|
+ */
+
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+			lcd0_panel: lcd0_panel {
+				compatible = "seco-innolux,ne070nb-04f", "panel-dpi";
+				backlight = <&lcd0_backlight>;
+				power-supply = <&reg_lcd0_vdd_en>;
+
+				width-mm  = <154>;
+				height-mm = <86>;
+
+				prepare-ms   = <100>;
+				enable-ms    = <400>;
+				disable-ms   = <100>;
+				unprepare-ms = <100>;
+
+				bpc = <8>;
+				bus-format = <DT_MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA>;
+				connector-type = <DT_DRM_MODE_CONNECTOR_LVDS>;
+
+				status = "okay";
+
+				panel-timing {
+					clock-frequency = <49500000>;
+					hactive = <800>;
+					vactive = <480>;
+					hback-porch = <1>;
+					hsync-len = <45>;
+					hfront-porch = <200>;
+					vback-porch = <22>;
+					vsync-len = <2>;
+					vfront-porch = <9>;
+					hsync-active = <0>;
+					vsync-active = <0>;
+					de-active = <1>;
+					pixelclk-active = <1>;
+				};
+
+				port {
+					lcd0_panel_in: endpoint {
+						remote-endpoint = <&lcd0_out>;
+					};
+				};
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&ldb>;
+		__overlay__ {
+			status = "okay";
+
+			lvds-channel@0 {
+				status = "okay";
+
+				port@1 {
+					reg = <1>;
+
+					lcd0_out: endpoint {
+						remote-endpoint = <&lcd0_panel_in>;
+					};
+				};
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&lcdif2>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@3 {
+		target = <&ldb_phy>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@4 {
+		target-path = "/";
+		__overlay__ {
+			reg_lcd0_vdd_en: regulator-lcd0-vdd-en {
+				compatible = "regulator-fixed";
+				regulator-name = "lcd0_vdd_en";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				gpio = <&gpio4 21 0>;
+				enable-active-high;
+			};
+		};
+	};
+
+	fragment@5 {
+		target-path = "/";
+		__overlay__ {
+			lcd0_backlight: lcd0_backlight {
+				compatible = "pwm-backlight";
+				pwms = <&pwm1 0 100000 0>;
+				enable-gpios= <&gpio1 6 GPIO_ACTIVE_HIGH>;
+				status = "okay";
+
+				brightness-levels = <0 100>;
+				num-interpolated-steps = <100>;
+				default-brightness-level = <60>;
+			};
+		};
+	};
+
+};